Hi guys, I dont post much but was hoping for some insight?

I have a Passport Plus (now discontinued) w/ the M-100 gun. Ive put several spools of wire through and countless hours. Ive noticed lately the gun wont fire, meaning when I go to start my weld it wont spark or feed?

I checked the ground cable connections and they look good. Are the M-100 guns prone to breaking or should I be concerned with the machine itself?

Looks like they sell a replacement trigger, which is what I suspect this might be?

Any suggestions on what I should be looking for?

Also, if I do need to in fact get a new gun what are my options for my setup. NOTE: I do a lot of tight spaces welding, so a smaller nozzle is nice.